Hak Seon Yang of Korea took gold in the vault at the North Greenwich Arena as Kristian Thomas finished eighth.
Yang scored highly on his second vault (16.553) and took the gold ahead of Russia's Denis Ablyazin (16.399) with Igor Radivilov of the Ukraine taking bronze (16.316)
Great Britain's Kristian Thomas, credited with driving GB's male gymnasts to team bronze last week, failed to land his second vault cleanly to finish on 15.533.
The 23-year-old has improved his vaults considerably recently but Yang, 19, took the gold with 16.553. Russia's Denis Ablyazin was second with 16.399.
Igor Radivilov of the Ukraine took bronze with 16.316.
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